From cf2b6ccbfb5544070f379040a3f01a3a782d7e1d Mon Sep 17 00:00:00 2001
From: Benguang Zhao <bgzhao@taosdata.com>
Date: Tue, 18 Oct 2022 09:58:02 +0800
Subject: [PATCH] enh: write idx ahead of writing its log entry in WAL

---
 source/libs/wal/src/walWrite.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index c088145ff6..aa6d52174d 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -449,6 +449,11 @@ static FORCE_INLINE int32_t walWriteImpl(SWal *pWal, int64_t index, tmsg_t msgTy
   pWal->writeHead.cksumBody = walCalcBodyCksum(body, bodyLen);
   wDebug("vgId:%d, wal write log %ld, msgType: %s", pWal->cfg.vgId, index, TMSG_INFO(msgType));
 
+  code = walWriteIndex(pWal, index, offset);
+  if (code < 0) {
+    goto END;
+  }
+
   if (taosWriteFile(pWal->pLogFile, &pWal->writeHead, sizeof(SWalCkHead)) != sizeof(SWalCkHead)) {
     terrno = TAOS_SYSTEM_ERROR(errno);
     wError("vgId:%d, file:%" PRId64 ".log, failed to write since %s", pWal->cfg.vgId, walGetLastFileFirstVer(pWal),
@@ -465,11 +470,6 @@ static FORCE_INLINE int32_t walWriteImpl(SWal *pWal, int64_t index, tmsg_t msgTy
     goto END;
   }
 
-  code = walWriteIndex(pWal, index, offset);
-  if (code < 0) {
-    goto END;
-  }
-
   // set status
   if (pWal->vers.firstVer == -1) pWal->vers.firstVer = index;
   pWal->vers.lastVer = index;